Letter box



FIG. 1 is a front and top perspective view of a letter box, showing my new design;

FIG. 2 is a rear and bottom perspective view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a left side elevational view thereof;

FIG. 6 is a right side elevational view thereof;

FIG. 7 is a top plan view thereof;

FIG. 8 is a bottom plan view thereof;

FIG. 9 is an enlarged view of a portion labeled, “FIG. 9” in FIG. 1;

FIG. 10 is an enlarged view of a portion labeled, “FIG. 10” in FIG. 1;

FIG. 11 is an enlarged view of a portion labeled, “FIG. 11” in FIG. 1; and,

FIG. 12 is an enlarged view of a portion labeled, “FIG. 12” in FIG. 1.

The even dashed broken lines in the figures illustrate portions of the article that form no part of the claimed design. The dash-dot dash lines in FIGS. 1, 9, 10, 11 and 12 are for the purpose of depicting the boundary line of the enlarged portion views and form no part of the claim. 

CLAIM The ornamental design for a letter box, as shown and described. 